Flex 3 to Flex 4 Migration AdvancedDataGrid Issue

[abhishek khandelwal]

Hello Friends,

We are facing following issue in our project:

Our application was created in flex 3, It has a custom AdvancedDataGrid (ADG) with customized groupItemRenderer and Column Renderers, 

Recently, we compiled the application with flex SDK 4.5, now when the grouped data is assign to ADG and vertical scrolling is done, we see null exceptions  in set data method of groupItemRenderer & column renderers, The stack trace reveals that the setupRenderer() method of AdvancedDataGridBaseEx has the item parameter as NULL.

The same code works fine in flex 3.

Please help/advise.

Thanks

Abhishek